Scaffold protein

? 2017 Pearson Education, Inc. Lecture Presentations byNicole Tunbridge and Kathleen Fitzpatrick Chapter 11Cell Communication 1 Concept 11.1: External signals are converted to responses within the cell Cells can signal to each other and interpret the signals they receive from other cells and the environment Signals are most often chemicals The same small set of cell-signaling mechanisms shows up in diverse species and processes Communication among microorganisms provides some insight into how cells send, receive, and respond to signals ? 2017 Pearson Education, Inc. 2 Evolution of Cell Signaling an example The yeast Saccharomyces cerevisiae has two mating types, a and ? Cells of different mating types locate each other via secreted factors specific to each type